Is it cold in winter? Is there much rain and snow?

In northern China, snow is an important symbol of winter. In the middle and lower reaches of the Yellow River in northern China and its vicinity, the snow in winter is often not as big as the light snow solar terms. The main reason is that the light snow solar term is ahead, the temperature is high, the total amount of water vapor in the air is larger than that of heavy snow solar term, and the possibility of heavy snow is greater.

In fact, the solar term with the heaviest snow in the middle and lower reaches of the Yellow River and its vicinity is neither "light snow and heavy snow" nor "slight cold and severe cold" (because the temperature was low at that time and there was less water vapor in the atmosphere), but a rainy solar term in spring.

In some areas of southern China, it is always warm as spring at the beginning of the winter solstice and during the Light Snow Festival (equivalent to October of the lunar calendar), so that some fruit trees mistakenly think that spring has come and bloom for the second time. As the saying goes, "It is warm in August and warm in September, and there is Koharu in October". In winter, it is usually not very cold before the so-called "March 9th" and "March 9th".

Winter introduction

Winter is one of the four seasons, and the change of the four seasons throughout the year is a continuous process, and it is also a process of yin and yang transformation, from one to two, from quantitative change to qualitative change. In this gradual process, beginning of spring, Changxia, beginning of autumn and beginning of winter, also known as the "four liters", are the beginning of the season. Traditionally, China regards the 24 solar terms "beginning of winter" as beginning of winter. In winter, everything is in a state of recuperation.

The commonly used methods of season division mainly include "solar terms method" and "temperature method". The winter divided by solar terms method starts from "beginning of winter" and ends before the next "beginning of spring". According to the temperature method, winter begins when the daily average temperature is lower than 10℃ for five consecutive days, and ends when the daily average temperature rises above 10℃ for five consecutive days.